$ git clone -n https://src.fedoraproject.org/rpms/libmatemixer.git /var/lib/mock/f45-build-16522-487/root/chroot_tmpdir/scmroot/libmatemixer
Cloning into '/var/lib/mock/f45-build-16522-487/root/chroot_tmpdir/scmroot/libmatemixer'...
$ git fetch origin 3697f70ad9330ca1026ff9f3d9006f5438f35cba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libmatemixer
 * [new ref]         3697f70ad9330ca1026ff9f3d9006f5438f35cba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3697f70 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild